'''
--  @owner:opentestcase005
--  @date:2020/11/9
--  @testpoint:使用analyze收集普通表的统计信息,限定列
'''
import sys
import unittest
sys.path.append(sys.path[0]+"/../")
from testcase.utils.Logger import Logger
from testcase.utils.Constant import Constant
from testcase.utils.CommonSH import CommonSH


logger = Logger()
commonsh = CommonSH('dbuser')
constant = Constant()

class SYS_Operation(unittest.TestCase):
    def setUp(self):
        logger.info('------------------------Opengauss_Function_DML_Set_Case0095开始执行-----------------------------')

    def test_analyze(self):
        # 创建表
        sql_cmd1 = commonsh.execut_db_sql('''
drop table if exists customer_info;
CREATE TABLE customer_info(WR_RETURNED_DATE_SK INTEGER ,WR_RETURNED_TIME_name varchar(200) );
insert into customer_info values(generate_series(1,200),'a');''')
        logger.info(sql_cmd1)
        self.assertIn(constant.TABLE_CREATE_SUCCESS, sql_cmd1)
        self.assertIn(constant.INSERT_SUCCESS_MSG, sql_cmd1)
        # 使用ANALYZE语句；查询系统表PG_STATS，只显示WR_RETURNED_DATE_SK列的数据
        sql_cmd2 = commonsh.execut_db_sql('''ANALYZE customer_info(WR_RETURNED_DATE_SK);
        ANALYZE verbose customer_info(WR_RETURNED_DATE_SK);
        select attname,null_frac,n_distinct,n_dndistinct from PG_STATS where tablename='customer_info';''')
        logger.info(sql_cmd2)
        self.assertIn(constant.ANALYZE_SUCCESS_MSG, sql_cmd2)

    # 清理环境
    def tearDown(self):
        logger.info('----------this is teardown-------')
        # 删除表
        sql_cmd3 = commonsh.execut_db_sql('''drop table customer_info;''')
        logger.info(sql_cmd3)
        logger.info('------------------------Opengauss_Function_DML_Set_Case0095执行结束--------------------------')
